2018년 2월 11일 일요일

Phytoalexin

Phytoalexin

Is phytoalexin produced by certain plants in response to attack by pathogenic bacteria.

Fight Alexin (Phytoalexin) is a generic term for antimicrobial properties, which is newly synthesized in response to stress and abiotic stress. It is effective against a wide range of pathogens, and there are various types of compounds for each plant species. , And so on. In many cases, however, it is not limited to these, and in general there are many cases called phytoalexins in general regarding the resistance reaction of plants. For the synthesis of phytoalexins, it is necessary as a trigger and they are produced, and it is not synthesized by healthy plants under normal growing conditions. On the contrary, even under ordinary conditions, we always refer to antimicrobial compounds synthesized and retained by plants (eg: Etc). Phytoalexin in one plant species may be a phytoantisin in another plant species.

table of contents

function

Phytoalexin produced by plants has the function of puncturing, delaying maturation, inhibiting proliferation against invading pathogens.

Plant cells that recognize small molecules derived from cells damaged by the invasion of the pathogen or pathogen exhibit two resistive responses. One is a reaction occurring in a short period regardless of the type of pathogen and the other is a reaction specific to the type of pathogen that begins somewhat late and occurs over a longer period of time.

As an early response, there are things such as to produce, etc., or to cause (one form) around the infected cell to prevent spread of the infection of the pathogen.

Long-term response (, SAR) involves, and, etc. Cells that receive these signals induce genes to prevent further invasion of the pathogen, but enzymes synthesizing phytoalexins are also one of them. Often, jasmonic acid or ethylene (which is a hormone that turns into a gas) is released from the injured cell, and surrounding plants undergo the signal to synthesize phytoalexin as well.

Effect on people

Some phytoalexins are attracting attention as being good for the human body. It is an example that is included in berries and wines such as grapes, bilberries, cranberries, etc. and is said to have anticancer properties and anti-aging effect. On the other hand, it is also known that phytoalexin is a substance that causes allergies and some food allergies to the human body.

footnote

1. *Dipak K. Das, Subhendu Mukherjee and Diptarka Ray (2011). "Erratum to: resveratrol and red wine, healthy heart and longevity". Heart Fail. Rev. *16(4). :. 2. *S. Wagner and H. Breiteneder (2002). "The latex-fruit syndrome". Biochem. Soc. Trans. *30: 935 - 940.

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Post Date : 2018-02-11 13:00

This article is taken from the Japanese Wikipedia Phytoalexin

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